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VulnerabilityPublished Updated

CVE-2026-79705: Golang github containers buildah · A flaw was found in the buildah/copier Go package

Affects golang-github-containers-buildahSource GCVE Database

0
Authoritative record:CVE-2026-79705· Medium 4.5

Not known to be exploited · CVSS 4.5 Medium.

Data as of 28 Oct 2026, 22:28 UTC

CVSS 3.1 base score
4.5Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10golang-github-containers-buildahpkg:deb/ubuntu/golang-github-containers-buildah?arch=source&distro=stonkingOther threatsAffected
  • =1.42.1+ds1-2build1
  • =1.43.2+ds1-3
Fixed in–
Ubuntu Pro 26.04 LTSgolang-github-containers-buildahpkg:deb/ubuntu/golang-github-containers-buildah?arch=source&distro=esm-apps/resoluteOther threatsAffected
  • 1.39.3+ds1-1syncable1 – 1.42.1+ds1-2ubuntu0.26.04.1~esm1
4 affected builds
Fixed in–
Ubuntu Pro 24.04 LTSgolang-github-containers-buildahpkg:deb/ubuntu/golang-github-containers-buildah?arch=source&distro=esm-apps/nobleOther threatsAffected
  • 1.28.2+ds1-3build1 – 1.33.7+ds1-1ubuntu0.24.04.3+esm3
15 affected builds
Fixed in–
Ubuntu 22.04 LTSgolang-github-containers-buildahpkg:deb/ubuntu/golang-github-containers-buildah?arch=source&distro=jammyOther threatsAffected
  • =1.21.3+ds1-1ubuntu1
  • =1.23.1+ds1-2
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

A flaw was found in the buildah/copier Go package. When used outside of Buildah by a non-root caller, a crafted tar archive containing malicious symlinks can escape the target extraction directory and create files outside the intended destination. Buildah itself uses chroot hardening and is not affected.

References

Community reviews

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